Grinding-machine.



PATENTE'D AUG.

Lawn. GRINDING MACHINE.

APPLICATION TILED 'APR. 21, 1906.

UNITED STATES PATENT OFFICE.

JOHN B. GURY, OF s'r. LOUIS, mssouar.

GRINDING-MACHINE Specification of Letters Patent.

Patented Aug. 11, 1908.

Application filed April 21, 1906. Serial No. 312,962.

My invention relates togrinding-machines,

and especially to machines for sharpening 10 cutting-knives. 1

, It has for its principal objects to simplify and improve the knife-holding and manipulating mechanism of such machines; to provide for. the adjustment of the bearing-support for the grinding wheel; and to attaln other advantages hereinafter more fully appearing. v

The invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

In" the accompanying drawings, which form part of this specification, and wherein like symbols refer to like parts wherever they occur, Figure 1 is a side view of my imarged detail view of a portion of the knifei Jlding and manipulating mechanism of the machine, parts being broken away and shown in section; Fig. 3 is a detail sectional view on line 33 of Fig. 1, showing the cooperative relation of the knife-holder to the grindingwheel; Fig. 4 is a detail sectional view on the line 4.4 of Fig. 1, showing the reverse positions of the adjustable stops for the knife mani ulating mechanism; and, Fi 5 is a detaiFsectional view of the adjusta le bearing-support for the grinding-wheel.

The machine comprises a supporting frame having a base portionl and an upstanding ortion 2. The base ortion of the frame is bifurcated horizontally and its forks are formed with two bearings 3 and 4 having their, bores in vertical alinement. Seated within the slot 5 of the bifurcation, with its threaded opening in register with the alining bores in the'bearing portions 3 and 4, is a knurled adjusting nut 6.

The grinding-wheel 7 is mounted on a s indie 8. The spindle 8 is provided wit ashoulder 9, grooved to form a pulley, and forming'an abutment for the grinding wheel when the clamping disk 10 and securing nut 11 are applied to said spindle on the opposite side of said wheel. The spindle 8 is mounted in a horizontal bearing 12 in a T-shaped support having a shank portion 13. A locking -rotatab roved grinding-machine; Fig. 2 is an en- This collar 14 is adjustably secured on the end of the spindle 8. I

The. shank portion 13 of the grindingwheel support is formed with a socket for the reception of the upper end. of a cylindrical post 15 which is fastened therein by a setscrew 16. The post is movably mounted in 'the bearings 3 and 4 provided therefor'in the frame,and has its lower portion threaded to engage the threaded opening in the adjusting nut 6. An elongated groove 17 is formed in the post and extends longitudinally thereof.

This groove is adapted to receiye the reduced end of a locking screw 18 wh ch works in a threaded boss on the bearing-and is provided witha handle 19 by which the same may be turned.

The manipulating mechanism comprises an elongated cylindrical rod 20 slidingly and y mounted in a horizontally arranged bearing 21 at the top of the extension 2 of the supporting frame The 'rod 20 is at one end with knurled fingerolds 22 whereby it can be manipulated. The rod is also formed with a longitudinally disposed groove 23. In the groove 23 is tightly fitted the knife-holder comprising substantially an elongated grooved pocket aving adjustable walls adapted to frictionally engage and hold a knife during the operation of sharpening. ocket is preferably composed'of two metal ic strips 24 and 25 secured to an interposed relatively narrower spacing strip 26, y screws. 27, and tightly force into the groove 23 in the rod 20. The interposed spacing strip is slightly tapered or gradually reduced in thickness towardsits outer edge, thus causing the outer strips 24 and 25 to converge at their outer edges when clamped against the faces of said strip 26 by tighten ing the screws 27. By loosening the screws 27, the strips 24 and 25 can be made to yield slightly upon the insertion of a knife-blade, and the holder can thus be made to accommodate blades ofvarious thicknesses.

In practice, a blade of uniform Width throughoutits length is forced with its back edge into the space between the outer strips 24 and 26 until said back edge abuts against the edge of the interposed spacing strip 26. In order to provide for the accommodation of a tapering blade, or a blade whose shank provided j acent to the outer end of the knife-holdin pocket and in alinement therewith. taperin blade is inserted in the space between tie plates 24 and 25 with its Widest portion in engagement with the edge of the spacing strip 26 and its narrower portion engaging the stop 28, which is then adjusted to bring the cutting edge of the blade parallel to the manipulating rod 20.-

In order to regulate the cooperative relation of the knife-holder to the grindingwhecl, adjustable stops 29 are clamped upon the rod 20. These stops 29 are oppositely disposed and provided with adjusting-screws 30 which are adapted to slidingly' engage aguide-rod 2%] to guide-the manipulating n'ieehanism during the reciprocathm thereof.

The length of travel of the manipulating nieclianisn'i in one direction is limited by the position of the stops 2) longitudinally of the rod 20 as said stops come in contact with' the bearing 21. The return stroke of the mechanism is limited by an adjustable collar 32 secured on the rod 20 between the knifeholder and the bearing 21.

In the operation of the machine, the knifeholder is lirst adjusted to its proper cooperative relation to the grinding-wheel to sharpen the particular blade. This adjust- 'ment is accomplished by inserting the blade into the holder and turning the rod 20 until the cutting edge of the blade engages the periphery of the grmdmg-whecl.

cured thereto in such a. position that its adjusting screw 30 engages the guide rod 31 on the sidecorresponding to the position of the cutting edge of the blade. The rod 20 is then turned to reverse the position of the cut ting edge of the blade upon the. grinding wheel, and the other stop 29 adjusted so that its adjusting screw 30 will engage the side of the rod '31 correspomling to said reverse position of the blade. The manipulating mechanism is then reciprocatcdto move the cutting edge of the blade forward and backward across the rotating grinding wheel, and

, reversed from one side to the other as desired. Fine adjustments canhe made when necessary by turning the adjusting screws 30.

When itis desired to adjust the grindingwheel relative to the knifeholder, or to substitute wheels of different diameters, the bearing support for the spindle can be adjusted vertically by loosening the locking screw 18 and turning the adjusting nut 6 to raise or lower the post 15'as the case may be. When the proper adjustment has been attained, the locking screw is again tightened.

()ne of they stops 29 is adjusted on the rod 20 and seaeapae from the groove 17, thus permittin the post to be turned in.the bearings 3 and a. i i hen the locking screw is ti htened it will not ter the move but wil impinge against the face of t 1e post and -)revent it from turning. It is sometimes esirable that the outer faces of the knife-holder may he graduated or marked, as at 33, to indicate the proper ositions in the holder for blades of dill'erent engths, particularly tapering blades. Thus, when a blade of certain length and taper has been. positioned in the holder with its end in register with one of the marks 33, and the stop 28 has been. once adjusted, nofurther V adjustment for the succeeding blades of the same size is necessary.

Motive power to rotate the grinding wheel may be supplied from any suitable source,

the grooved pulley 9 being provided for a driving belt.

The knife X shown in the drawings is a representation of a tapering blade used in a cloth cutting machine, and is here shown to illustrate the purpose of the adjustable stop 28.

Obviously, my device is ca able of considerable modification within t ie scope of my invention and therefore I do not wish to be limited to the specific construction shown and described.

What I claim as my invention and desire to secure by Letters Patent 1s:

1. A grindingmachine comprising a frame,

a grinding wheel adjustably mounted on said frame, a knife holding and manipulating mechanism, and means for adjusting said grinding wheel relative to said mechanism, said mechanism being adapted to reciprocate parallel with the axis of said wheel and being rotatably mounted relative to said axis, all arranged so that both sides of a knife therein may be brought into cot'iperative relation to said wheel without changing its relation to said mechanism.

2. A grinding-machine comprising a frame, a grinding-wheel adjustably mounted on said frame, a knife-holding and manipulating mechanism mounted on said. frame in 006perative relation to said grinding-wheel, means for adjusting said grinding-wheel relative to said knife-holding and manipulating mechmechanism mounted on said frame, means for adjusting said grinding-Wheelrelative to said knife holding and manipulating mechanism, and means for adjustin said'knifeholding and manipulating me'c' 'a'nism relative to said grinding-wheel, said last named adjusting means also constituting a guide for said knife-holding and manipulatingmeans,

said knife holding and manipulating mech; anism being adapted .to reciprocate parallelwith the axis of said wheeland being rotatably mounted relative to said axis, all arranged so that bothsides. of a knife therein may be brought into cooperative relation to said Wheel without changing its relation to said mechanism.

4. A grmding-jmachlne comprising a frame,

ism mounted on 'said frame, agrinding-wheel adjustably mounted on saidframe in cooper: ative relation to said knife-holding mechanism, and means for-adjusting said Wheel, said means comprising a wheel-bear ng support having a post movably mounted in bearings in said frame, said pos'thaving a screw threaded portion, 'a nut mounted between said bearings and engaging the threaded portion of said post, and means'for locking said post in its bearings, said knife holding and manipulating mechanism being adapted to reciprocate parallel with the axis of said wheel and being rotatably mounted relative to said axis, all arranged so that both sides of a knife therein may be brought into cooperative relation to said wheel without changing its relation to said mechanism 5. A grinding-machine comprising a frame, a grinding-wheel mounted on said frame, a knife-holding and manipulating mechanism reci ro'catingly and reversibly mounted on sai frame, and means for adjusting said knife-holding and manipulating mechanism relative to said grinding-wheel, said means also constituting a guide for said mechanism during the reciprocation thereof.

6. A grinding-machine comprising a frame, a grinding-wheel mounted on said frame, and

a knife-l'iolding and manipulating mechanism com rising a rod slidingly and rotatably mounted holder on said rod adapted to' be moved across said grinding-wheel in cooperative relation thereto, a guide on said frame, and an adjustable "stop on said rod adapted to en gage said guide, whereby said knife-holding and manipulating mechanism may be ad justed and thereof.

7. A grinding-machine comprising a frame, a grinding-wheel mounted on said frame, and a knife holdingand manipulating mechanism com risinga rod mounted in a bearing on said guided during the operation cooperative relation to said grinding wheel,

ating meohan-,

in a bearing on said frame, a knife- I ame,-Z a knife-holder. on said rod in and adjusting screws connecting said plates,

and an adjustable stop adjacent to said pocket and in 'alinement therewith.

9. A grinding-machine comprising a frame, a grindm wheel mounted on said frame, a knife-hol er mounted upon a manipulatin rod in proximity tosaid rindingwheel, said manipulatin rod bein s idingly and rotatably mounte, on said fiame, a guide-rod secured to said frame parallel with said manip' ulating rod, and a stop adjustably secured'on said-manipulating rod and adapted to slidingly engage said guide-rod. H

10. A grinding machine comprising a frame, a grindin -wheel mounted on said frame, a knife-ho der mounted u on'a manipulating rod in proximity to sai grinding- ,wheel, said manipulating rod being sliding and rotatably mounted on said frame, a guide-rod secured to said frame parallel with said manipulating rod, and stops adjustably secured on said manipulating rod, one of said 'stops being adapted to slidingly engage the guide-rod on the side corresponding to the operative position of said knife-holder.

11. A grinding machine com rising a frame, a grinding-wheel mounts on said frame, a knifeholder mounted u on a ma nipulating rod in proximity to sai grindingwheel,said manipulating rod being slidingly and rotatably mounted on said frame, a guide-rod secured to said frame parallel with .said manipulating rod, and a stop adjustably secured on said manipulating rod and rovided with an adjusting screw adapts to slidingly engage said guide-rod.

12'. A grinding machine comprising a grinding-wheel and a knife-holding and ma nipulating mechanism, said mechanism being provided with a knife-holder adapted to accommodate tapering blades of different lengths, and having an adjustable stop for maintaining the cutting edge of said blades parallel with the axis of said manipulating mechanism, and means to indicate the proper position in said knife-holder of blades of like size after said stop has been adjusted. I

13. A grinding machine comprising a grinding-Wheel and a knife-holding and manipulating mechanism, said mechanism being rovided with an elongated grooved knifeolder having laterally adjustable walls, and

an adjustable stop infoooperative relation to said knifwholdm' adapted to maintain the cutting edge of knife-blades parallel with the axis of said. manipulating mechanism, and

I l l means on said holder to indicate the proper i jmsition in sa' 1 knife-holder of blades of dil 1 Brent lengths.

14. A grindingAnacnnm (fon'ipi'lslng a frame, a grindingavlicol mounted m1 said flame, and a knifedlulding and nn ni mlaring j mechanlsn'i in cm'ijxnahve relation in SzHIl gnndlng-Whcol and comprising a grmwud' frame, a winding Wheel mounted on said frame,- a knife-h0lding and. manipulating mechanism adjacent to said grinding Wheel. and (omjnising a grooved pocket formed of two plates and an interposed plate, of a Width narrmwr than said other plates and forming a bottmn for said pocket, and adjusting sc-rmvs mmm-irting said plates, and an adjust ahlu stop adjacent; to said pocket and in alilmnmnltherewith.

Signwl at lmuis, Missouri, this 19th da 01 April, 1906.

JOHN B. (HFRY.

Witnesses: I

J. B. MEGOWN,

ARTHUR G. inmvoon. 

